Taper-gage.



J. E. BALL. TAPER GAGE. APPLIOATION FILED JUNE 18 1910.

Patented Ju1y 4, 1911.

2 SHEETSSHEET 1.

INVENTOR:

W ITNESSESI A TTORNE v.

COLUMBIA PLANOGRAPH co WASHINGTON, D. c.

J. E. BALL.

TAPBB. GAGE.

APPLICATION FILED 111111-2111, 1910.

' Patented July 4, 1911.

2 8HEETS-SHEBT 2.

- lm/enio r: 4/66 Ma 5&1 A ZZo r21 ey- JOSEPH E. BALL, F SYRACUSE, NEWYORK.

IAIPER-G'rAGrJil.

Specification of Letters Patent.

Patented July 4:, 1911.

Application filed June 18, 1910. Serial No. 567,632.

To all whom it may concern:

Be it known that I, JOSEPH E. BALL, of Syracuse, in the count-y ofOnondaga, in the State of New York, have invented new and usefulImprovements in Taper-Gages, of which the following, taken in connectionwith the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improvements in gages and refers moreparticularly to, taper gages for measuring the angles or degrees oftaper of tapered or beveled obects, and at the same time indicating thedegree of incline, taper or bevel of such objects in inches per foot inlength.

The main object is to simplify the construction and adjustment of thisclass of instruments and at the same time to increase its range ofusefulness and accuracy of measurement.

Another object is to provide means for accurately centering objects ofcircular cross section with reference to the contact bar so that theinstrument may be more readily ad j usted to measure the angle or taperof such object.

Another object is to graduate the contact bar so that the length of thetaper of the object may be determined in the same operation of measuringthe angle.

A still further object is to provide the supporting-arm in the contactbar with graduations whereby the diameters of various objects may bemeasured.

Other objects and uses relating to specific parts of the instrument willbe brought out in the following description.

In the drawings: Figure 1 is a front elevation of my improved taper gageshown as applied to measuring the angle of a tapered body, a portion ofthe supporting-base or rest being shown in section to disclose one ofthe fastening means. Fig. 2 is a side elevation of the same deviceshowing the dial, dial-supporting head and clamping devices in section.Fig. 3 is a horizontal sectional view, taken on line 33 Fig. 2, showingparticularly the main supporting-base or rests, portionof which isbroken away. Fig. 4 is an end view of the right hand end of the deviceshown in Fig. 8. Fig. 5 is a transverse sectional view taken on line 5-5Fig. 1, showing particularly the inner set of centering-arms. Fig. 6 isa horizontal sectional View through the dial and dial-plate, taken online 6-6 Fig. 1. Fig. 7 is a vertical sectional view taken on line 7'('Fig. 1. Figs. 8 and 9 are perspective views of the detached sections ofthe supporting base.

In carrying out the objects stated, I provide a suitable supporting-base1 composed of sections -2 and 3 secured to gether end toend by anysuitable fastening means, as screws 4, the section 2 being provided witha flat bearing face -5- Figs. 1 and 9, while the section 3 is providedwith a V-shape bearing face 6 Figs. 3 and 8 depressed below the bearingface 5, the base of the groove bearing face 6- being disposed in a planesubstantially parallel with that of the flat face These bearing facesconstitute rests for receiving and supporting the object or article, asa, the taper or bevel of which is to be measured, the flat face -5 beingused to support round taper articles when it is desired to measure thetaper of included angles of diametrically opposite sides, while thegroove 6 is used when it is desired to duplicate a previously formedtaper.

The object in making the base in two parts as described, is more forconvenience in accurately forming the V-shape groove in the section -3and also to facilitate the placing in position of the inner centeringdevices hereinafter described, otherwise the entire base might be madein one piece.

Secured to and projecting rearwardly and upwardly from the rear side ofthe base is a bracket '7 terminating at its upper end in a circular head.8 which bears upon its front marginal face a fixed index 9-, as bestseen in Fig. 1.

Centrally secured to the circular head 8 is a forwardly projectingthreaded stud or screw 10 upon which is journa-led a circular concentricdial plate -11 having the front face of its marginal edge preferablybeveled and provided with a series of, in this instance four, sets ofgraduations 12, each numbered from 0 to 90. inclusive, and representingdegrees, one of the 0 graduations being normally registered with thefixed index -9, while the diametrically opposite 0 graduation isnormally registered with a fixed 0 index mark 13 on the adjacent frontside of the head 8. This portion of the head 8 is also graduated at -14in opposite directions from the 0 index to represent inches of inclineper foot in length of tapers or bevels. These inch graduations arenumbered consecutively in opposite directions from the 0 illdex 13- andcorrespond to certain degrees or angles indicated by the graduations 12,that is, if the dial 11- is adjusted rotarily to bring the 5 degreegraduation into registration with the 0 index 9----, the oppositegraduations l3 will inclicate the bevel in inches per foot in length ofsuch angle.

The front face of the dial is provided with a diametrically extendinggroove or recess 15 in which is slidably fitted a longitudinallyadjustable arm -16- having a lengthwise slot -17- for receiving thescrew 10, and a suitable guide plate -18 also mounted on the screw andfitting closely in the slot '-17- to guide the arm 16 in itslongitudinal adjustment.

The thickness of the arm 16- is substantially the same as the depth ofthe groove -15, so that the front face of the arm is substantiallycoincident with that of the face of the dial and is adapted to beengaged by a clamping nut 19- on the screw 10 for simultaneouslyclamping the arm 16 and dial in their adjusted positions.

Secured to the lower end of the arm 16 is a longitudinally adjustablecontact bar -20 having its lower edge disposed at right angles to theplane of movement of the arm 16 and also in a plane substantiallycoincident with the base of the groove 6 and longitudinal center of thefiat bearing face -5, so that when the 0 gradnations on the dial 11 areregistered with the corresponding 0 indexes 9- and 13 on the head S thearm 16 will be disposed in a vertical position at right angles to thebase of the groove 6 and bearing face 5, while the lower edge of thecontactbar20 will be parallel with the base of said groove and fiatbearing face 5. It therefore follows that if a tapered or beveledarticle is laid upon the flat bearing face -5 and the arm 16 and contactbar adjusted rotarily to bring the lower straight edge of the contactbar into engagement with the upper face of the bevel or taper, thegraduations 12 on the dial -l1 will indicate the exact degree or angleof taper, while the opposite graduations 14 will indicate the taper orbevel in inches per foot in length.

If it is desired to reproduce the taper of the article, as a, the lattermay be placed in the groove -6- and the arm -16 and contact bar 20adjusted to bring the lower straight edge of the latter into contactwith the bevel after which the clamping nut -19is tightened to holdthese parts in their adjusted position so that in reproducing the taperin duplicate the latter may be inserted in the groove and against thelower straight edge of the bar 20 to test the accuracy of its taper.

In so far as testing of duplicate tapers or angles is concerned, thistest may be made either in the groove of the member -3 or on a flatsurface of the section 2 between the arms -24 and 24 but the groove ismore convenient in that the tapered article is more conveniently placedand centered therein butisnot adaptedto cooperate with the contact bar-20- in the measure ment of including the angles and therefore I providethe section 2 with a flat upper face and the centering arms -2et and 2l. Aside from the greater convenience in the use of the groove member 3for testing duplicate tapers, the groove might be dispensed with and allof the tests made upon a fiat-upper surface between the arms 24 and--24;-.

The contactbar 20 is adjustable laterally to permit it to be broughtinto contact with tapers of small angles which may rest in the groove -6and also for convenience in measuring the lengths of the taper ofarticles which may rest upon the flat bearing face 5 and for thispurpose is provided with a lengthwise slot -21 which receives a closelyfitting lateral projection 22- on the lower end of the arm -16, saidcontact bar being held in its adjusted position by a clamping screw 23,as best seen in Figs. 1, 2 and 7.

The V-shape groove 6 serves as a means for centering round taperedarticles with reference to the lower straight edge of the contact bar-20- so that the latter may be brought into engagement with the portionof the taper or other round article at the side diametrically oppositeto the base of the groove, thereby expediting the work of setting theinstrument for reproducing certain tapers or angles.

-In order that similar objects or articles may be properly centered whensupported upon the fiat face 5, I provide separate sets of centeringarms 2-{t and -2et arranged in pairs, some distance apart,

lengthwise of the section 2 and at opposite sides of the longitudinalcenter of such section.

The arms 24 and 24E- at opposite sides of the longitudinal center of thesection -2 are pivotally mounted for independent movement upon parallelsupporting rods or bolts 26 running through apertures from end to end ofsaid section, those of each coacting set being connected forsimultaneous action by intermeshing gears or toothed segments 27 andspring pressed toward each other by one or more springs 28, as best seenin Figs. 1, 2 and 5.

The coacting sets of centering members -24 and 24 are positioned so thatwhen brought together their meeting faces lie in substantially the samevertical plane as the lower straight edge of the contact bar and theirupper ends are usually deflected laterally in oppositedirections so asto permit the article to be measured to be pressed between them andagainst the upper bearing face of the base, thereby spreading thecentering devices apart. During this spreading of the centering devicesthey are spring pressed against opposite sides of the object under test,and thereby serve to center said object to bring its vertical diameterin a plane coincident withthat of the contact bar, so that when thelatter is adjusted to measure the angle of taper or bevel it will engagethe top face of the object in the plane of its vertical diameter.

The outer coacting set of centering devices are adapted to engage thelarger portion of the object, while the inner set of centering devicesare adapted to engage a smaller portion of the taper, each set actingindependently of the other to keep the axis of the object in a planecoincident with that of the contact bar. These centering devices may beclamped in their adjusted position by simply tightening one of the bolts26- which is provided at its inner end with an enlarged head forengaging the end face of the adjacent gear 27-,.the opposite end of saidbolt .being screw threaded and provided with a nut -26 engaging the endface of the adjacent gear, so that by tightening the nut it togetherwith the inner head of the bolt will frictionally clamp the adjacentgears against the corresponding end faces of the base section 2- therebyholding the centering arms in their adjusted positions.

The contact bar 20 is provided along its lower edge with graduations 29representing inches and fractions thereof, and numbered consecutivelyfrom one end for the purpose of measuring the length of tapers, bevelsand similar dimensions. The opposite ends of this bar are straight anddisposed at right angles to the lower edge and may be used for measuringangles, one of said edges being provided with graduations -30-representing inches and fractions thereof and may be used for verticallinear measurements. The arm -16 is also provided along one edge withgraduations -81 representing inches and fractions thereof and adapted tobe registered with a fixed graduation -32 on the dial 11- for measuringdiameters and other thicknesses which may be placed between either ofthe bearings 5 or 6- and lower edge of the contact bar 20, saidgraduations -3l' being numbered from the top downward in such mannerthat the 0 graduation is registered with the fixed index 32 when thelower edge of the contact bar 20 is engaged with the upper flat bearingface -5.

What I claim is:

1'. In a taper gage, a base having a V- shape groove in the upper sidethereof for centering an object the taper of which is to be measured, abracket secured to and rising from said base at the rear side thereof, adial supporting head secured to the upper end of the bracket, a dialrotatably mounted on said head and provided with graduationsrepresenting degrees of a circle, a rock arm slidably interlocked withthe dial to rotate the latter as the arm is rocked, said arm beingadjustable diametrically of the dial toward and from the base and havingits lower end provided with a straight edge disposed in the samevertical plane as that of the base of the groove.

2. A taper gage comprising a base having a groove in its upper side forreceiving an, article the taper of which is to be measured, a bracketrising from the base at one side of the groove, a dial supporting headon the upper end of the bracket directly over the groove, a rotary dialon the head provided with graduations representing degrees of a circle,a rock arm slidably mounted on the dial to rotate therewith andadjustable transversely thereof, and means to clamp the arm to the dial,said arm having a straight edge disposed in the same vertical plane asthe base of the groove.

3. A taper gage comprising a base, a bracket rising from the base, arotary dial journaled on the bracket, an arm slidable radially on androtatable with the dial, a contact bar on the arm and means on the basefor centering an article, the taper of which is to be measured withreference to said bar.

1. A gage comprising a base, movable centering means for an article, thetaper of which is to be measured, a bracket rising from the baseand'provided with a head, a rotary dial journaled on the head, said headand dial having graduations to indicate the relative position of thedial, an arm rotatable with the dial, and a contact bar on said arm.

5. A taper gage comprising a base having a V-shape groove in its upperside, a bracket rising from the base and rigidly secured thereto, a dialrotatably mounted on the head, separate sets of graduations on the headand dial concentric with the axis of said dial in a plane parallel withthe groove, an arm rotatable with the dial, and a contact bar on the armand having its contact face in the same vertical plane as that of thebase of the groove.

6. A taper gage comprising a base, having downwardly converging bearingsfor an article, the taper of which is to be measured,

a bracket secured to and rising from the base, a head on the bracket, adial rotatably mounted on the head, an arm mounted on the dial andslidable radially thereof, said arm having a contact bar movable alongand in the vertical plane of the apex of the downwardly convergingbearings, graduations on the dial concentric with its axis forindicating its degree of rotation from a predetermined position, andgraduations on the arm for indicating its amount of radial adjustment.

' 7. A taper gage comprising a base, centering arms pivoted to andrising from the base, a bracket secured to and rising from the baseabove said arms, a dial rotatably mounted on the bracket above the arms,and a contact device rotatable with the dial and having a portionthereof movable between said arms.

8. A taper gage comprising a base, a

bracket secured to and rising from the base, a dial rotatably mounted onthe bracket, centering members on the base connected for simultaneousmovement in reverse directions, and a contact device mounted on the dialand having a port-ion thereof movable between the centering members.

9. A taper gage comprising a base, a bracket rising from the base, arotary dial on the bracket, a pair of centering members mounted on thebase and movable toward and from each other, and a contact devicemounted on the dial and adjustable radially thereof, said device havinga portion thereof movable between the centering members.

In witness whereof I have hereunto set my hand on this 11th day of June1910.

JOSEPH E. BALL.

WVitnesses H. E. CHASE, A. L. HUMPHREY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatents, 9

Washington, D. C.

